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Example 7: Four-Quadrant (WH) Test – Solid-state 9S meter
Meter:
Voltage:
Kh:
TA:
CL:
Accessory:
A Four-Quadrant (WH) Test consists in running the equivalent of a Quick Test at
various phase angle lags to assess the meter's ability to register energy in all four
quadrants of the power vector diagram.
Please note that the three potential coils of the meter are automatically switched in
parallel by the socket.
1. Connect the optical pickup
To connect the cables:
•
Plug the RJ12 connector of the straight cable of the Optical Pickup into the
I/O port of the socket.
•
Look for the LED output pulse of the meter and position the suction cup of
the Optical Pickup over it.
Note: An optional adapter may be required on some meters and can be purchased
as an option.
Note: Some high-end meters can have two pulse outputs, one for the Watthour
reading and one for the VARhour reading. Connect the Optical Pickup to the
Watthour pulse output before starting the test.
2. Starting a Four-Quadrant (WH) Test
Once the installation is completed and the connection to the socket and meter setup
is done (see previous section), we can proceed with the test.
Select Four-Quadrant (WH) Test.
Start the sequence; the load current will increase to HL; the meter will start to send
pulses and the internal electronic standard will begin to register the energy that
passes through the meter. The test can be stopped (aborted) at any time.
In addition to the test parameters appearing on the display, the operator can see the
voltage and current applied to the meter, the chronometer and the cumulated
energy registered by the electronic standard.
Solid-State, Form 9S
120-480V
1.8
2.5
20
Optical Pickup
MT-1/WT3 User Guide
Page • 39
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